When upgrading it is best to do some clean up on the older site so that you aren't using things that are not supported on the new version. In other words you have to think about how the new site will work.
I have an older site in D5 that I am working on upgrading to D6. Unfortunately, some modules that were used in the old site no longer exist (addnode for example). What will happen when I upgrade without this module?
Katie
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